Creative Commons licenses provide a flexible range of protections and freedoms for authors, artists, and educators. It provides educators with access to images, videos, music, and graphic all with less restrictive rights for using the material. For example, you go right from Creative Comments to Flickr images that you can use. The one caveat while searching for content, be careful not to use a different search term, because you will be searching in the regular libraries. When want search for a different, go back to Creative Commons and search from there.
I am trying to learn a number of software applications to enhance my abilities to provide interesting content to my students. In the past, I have purchased a number of books on Adobe applications (Illustrator, Dreamweaver, Muse, Photoshop, etc). I found the books useful but regretted the hole they burned in my debit card. I just signed up with Safari Books Online. They have a broad selection of technology books, including the Adobe Classroom in a Book series and the Missing Manual series. For $20 per month for the first six months ($27 thereafter), you can develop a shelf of 10 books. You can get full access for $40 per month. Based on my past purchases, I think this is a very good deal. You can check it out at http://support.safaribooksonline.com/home